Abstract
A new tetradodecyl-substituted DTBTBT donor unit is synthesized by a specific bis-annulation via Suzuki-Miyaura coupling and successfully incorporated into light absorbing electron donor copolymers for OPV and hole and electron transport OFET polymer devices. All copolymers (DTBTBT-co- benzothiadiazole (Bz), DTBTBT-co-thiophene (T) and DTBTBT-co-thienothiophene (TT)) show fully coplanar backbones and strong intermolecular interactions. The DTBTBT-Bz copolymer led to a deep HOMO level (-5.2 eV) and thus a large V oc value of 0.92 V with PC71BM as electron acceptor and a PCE of 3.7% with a Jsc of 6.78 mA/cm2 could be obtained. A hole mobility of 0.1 cm2/(V s) has been observed for the highly coplanar and more crystalline DTBTBT-T copolymer.
Original language | English (US) |
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Pages (from-to) | 727-735 |
Number of pages | 9 |
Journal | Macromolecules |
Volume | 46 |
Issue number | 3 |
DOIs | |
State | Published - Feb 12 2013 |
Externally published | Yes |
ASJC Scopus subject areas
- Organic Chemistry
- Polymers and Plastics
- Inorganic Chemistry
- Materials Chemistry